INVESTIGADORES
FERNANDEZ Alicia Silvina
congresos y reuniones científicas
Título:
Biodegradable soy protein polymer films as a release device of nematophagous fungi Duddingtonia flagrans chlamydospores
Autor/es:
SAGÜÉS, MARÍA FEDERICA; CIANNAMEA, EMILIANO; ZEGBI, SARA; STEFFANI, PABLO; FERNÁNDEZ, ALICIA SILVINA; GUERRERO, INÉS; IGLESIAS, LUCÍA; RUSECKAITE, ROXANA; SAUMELL, CARLOS
Lugar:
Belem
Reunión:
Congreso; XIX Brazilian Congress of Veterinary Parasitology; 2016
Resumen:
Biological control by nematophagous fungi against gastrointestinal parasitic disease of ruminants is a ecologic method to reduce the use of anthelmintic synthetics in farm animal production. In this study, films made from soyprotein (SP) were evaluated to ascertain the biodegradability and release of chlamydospores (CL) of Duddingtonia flagrans. The films of group A (GA) and group B (GB) were obtained by casting. In GA 696.300 CL were placed on the material surface, in the GB the same number of CL was sprinkled on an adhesive liquid made of SP. Third group (GC) comprised of films molded by compression with CL incorporated the same way as GB. Three rolled up films from each group were immersed in distilled water at 27º C and constant agitation. Samples were taken every two hours during the first eight hours and then every 24 hours and the number of CL in each aliquot was determined until h 264 when ended the test. The degradation began 48 h post-initiation of the experiment; GC disintegrated by h 144, while GA and GB degraded more slowly and maintained their rolledform until the end of the test. The release of CL depended on processing method and way of incorporating CL; GA started releasing CL by h 144 (6%) and reached 35% by h 264; GB started releasing CL by h 96 (15%) reaching 43% after 264 h. For GC the release was very fast, 96 h, which was associated with prematuredegradation of the support matrix. This preliminary study showed SPI films GA, as controlled-release device and sustained CL D. flagrans and its potential application to the biological control by nematophagous fungi.